Russia Expels German Diplomats as Tensions Rise Over Ukraine

Russia is expelling more than 20 German diplomats in retaliation for Germany expelling Russian diplomats.
The expulsions are intended to curb suspected intelligence operations in each country.
Relations between Russia and Germany have worsened since Russia invaded Ukraine in February.
The U.S. plans to train Ukrainian troops to use Abrams tanks as NATO agrees Ukraine will eventually join the alliance.
Russia's richest citizens earned over $150 billion in the past year despite economic sanctions.